MANILA, Philippines — A magnitude 5.4 earthquake shook a large swath of Southern Luzon and parts of Metro Manila Friday morning, according to the Philippine Institute of Volcanology and Seismology (Phivolcs). The quake, which was initially measured at magnitude 5.8, struck at 10:38 a.m. Its epicenter was located 13 kilometers southwest of Mamburao, Occidental Mindoro,
